. The examination of the urine of the horse and man . With the urine containing sediment, shake thoroughly todistribute it, then pour into a centrifugal tube and revolve untilthe sediment is completely precipitated. Note the reaction ofthe urine, whether acid or alkaline. Pour off the clear superna-tant fluid. If the urine is acid pursue the following scheme. Acid Urate of Soda. If the deposit is more or less red, treatwith a little boiling water. If the sediment is dissolved it is com-posed of the acid urate of soda. Caustic potash does not dissolve 61 it, hydrochloric acid gives a crystallin
. The examination of the urine of the horse and man . With the urine containing sediment, shake thoroughly todistribute it, then pour into a centrifugal tube and revolve untilthe sediment is completely precipitated. Note the reaction ofthe urine, whether acid or alkaline. Pour off the clear superna-tant fluid. If the urine is acid pursue the following scheme. Acid Urate of Soda. If the deposit is more or less red, treatwith a little boiling water. If the sediment is dissolved it is com-posed of the acid urate of soda. Caustic potash does not dissolve 61 it, hydrochloric acid gives a crystalline precipitate, the depositwill give the murexide test. (Page 26). Uric Acid. If a crystalline deposit, almost insoluble inboiling water, but soluble in caustic potash and giving themurexide test, it is uric acid. Cystine, (very rare). The deposit is crystalline, insolublein caustic potash but soluble in ammonia and hydrochloric acid. Pus. A white, dense, mucus deposit, viscid and not oftenmixing with the urine; caustic potash renders it more viscid;. Plate forms of Calcium Carbonate Crystals. (Horse Urine). 62 the microscope shows the pus corpuscles,in acid urines. This deposit is rare Blood. Red deposit; the tincture of guaiac with hydrogendioxide gives a blue color. The spectroscope gives the charac-teristic lines in the spectrum. The hemin test will show thecharacteristic crystals. When blood is present the urine is gen-erally albuminous. Some deposits not very abundant and having no specialchemical reaction may be recognized under the microscope. Neutral or Alkaline Urine. Alkaline Urates. More or less reddish deposits easily solublein boiling water and giving the murexide test. Triple Phosphate or Calcium Phosphate. A white deposit,insoluble in boiling water, soluble in acetic acid, does not givethe murexide test; acidified with nitric acid, the molybdate ofammonia solution gives a yellowish precipitate in the cold. Calcium Oxalate. White deposit insoluble in bo
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